CN108769139A - The watercraft remote monitoring system communicated based on VDES and S-band - Google Patents

The watercraft remote monitoring system communicated based on VDES and S-band Download PDF

Info

Publication number
CN108769139A
CN108769139A CN201810432946.3A CN201810432946A CN108769139A CN 108769139 A CN108769139 A CN 108769139A CN 201810432946 A CN201810432946 A CN 201810432946A CN 108769139 A CN108769139 A CN 108769139A
Authority
CN
China
Prior art keywords
band
data
ship
vdes
vhf
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201810432946.3A
Other languages
Chinese (zh)
Other versions
CN108769139B (en
Inventor
董洪理
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Fu Real Ship Technology Co Ltd
Original Assignee
Shanghai Fu Real Ship Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Fu Real Ship Technology Co Ltd filed Critical Shanghai Fu Real Ship Technology Co Ltd
Priority to CN201810432946.3A priority Critical patent/CN108769139B/en
Publication of CN108769139A publication Critical patent/CN108769139A/en
Application granted granted Critical
Publication of CN108769139B publication Critical patent/CN108769139B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network arrangements or protocols for supporting network services or applications
    • H04L67/01Protocols
    • H04L67/12Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B49/00Arrangements of nautical instruments or navigational aids

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Computing Systems (AREA)
  • General Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The present invention proposes the watercraft remote monitoring system communicated based on VDES and S-band, including:Ship end, the base stations VDES, S-band base station and monitoring center end;VDES systems are constituted between ship end and the base stations VDES, VDES satellites.S-band sts satellite transmission system is constituted between ship end and S-band base station, S-band satellite.Monitoring center end is connect by gateway with the base stations VDES and S-band base station, realizes the access at monitoring center end and VDES systems and S-band sts satellite transmission system, can obtain the data of base station acquisition, and forward ground control instruction by base station.Very high frequency(VHF) data transmitting/receiving equipment and S-band data transmitting/receiving equipment is arranged simultaneously in ship end, and the gating of very high frequency(VHF) channel and S-band channel is carried out by information transport management module and data to be transmitted are encoded according to the message format of respective channels defined according to selected channel, the transmission channel of S channels is increased for the transmission of ship monitor data, the data to be transmitted can be shunted, improve efficiency of transmission.

Description

The watercraft remote monitoring system communicated based on VDES and S-band
Technical field
The present invention relates to ship overocean communications field, especially a kind of ship communicated based on VDES and S-band is long-range Monitoring system.
Background technology
In recent years, naval technology continues to develop, International Telecommunication Union 2012 world's radio communication (WRC-12) it is big After the meeting, it is proposed that VDES (VHF Data Exchange System, very high frequency(VHF) data exchange system), VDES are to be directed to shifting waterborne Ship automatic identification system (AIS) in dynamic business scope reinforces and upgrading edition system, integrates AIS, special applications message (ASM) With three functions of broadband vhf data exchange (VDE), it is suitable for ship status and monitors.AIS under VDES frameworks has ship Identification, position report tracking, search and rescue function, operational radio channel CH75 and CH76 correspond to satellite respectively AS1 and AS2 channels, and data transmission, all using approval information structure, essentially, AIS is as a navigation system System is not appropriate for mass data transmission.ASM is used for transmission some special message informations, and occupancy radio channel is ASM1 And AMS2.VDE functions realize the big data transmission between ship to ship and ship to shore.
But as ships data transmission demand gradually increases, the limited channel bandwidth resources of VDES can not adapt to largely It is transmitted while data, when especially VDES is applied to ship status monitoring field, the status data to be monitored is usually to regard Frequency according to or image data, rate is relatively low when data transmission.
Invention content
Goal of the invention:For the data transmission channel resource for increasing between ship and bank, alleviate existing VDES systems in ship The pressure of data transmission in monitoring field, the present invention propose the watercraft remote monitoring system communicated based on VDES and S-band.
Technical solution:Technical solution proposed by the present invention is:
Based on the watercraft remote monitoring system that VDES and S-band are communicated, including:Ship end, the base stations VDES, S-band base station With monitoring center end;
Monitoring center end is connect by gateway with the corresponding base stations VDES, S-band base station, and the data that base station obtains are obtained, with And command signal is forwarded by base station;
Ship end includes:Very high frequency(VHF) data transmitting/receiving equipment, locating module, S-band data transmitting/receiving equipment, boat-carrying six degree of freedom Measuring device, information transport management module, long-focus monopod video camera, memory module;
Information transport management module respectively with very high frequency(VHF) data transmitting/receiving equipment, locating module, S-band data transmitting/receiving equipment, Boat-carrying six degree of freedom measuring device, long-focus monopod video camera, memory module are connected;
The satellite end interaction data of very high frequency(VHF) data transmitting/receiving equipment and VDES is realized by very high frequency(VHF) channel between ship and ship And the radio communication between ship and bank;
S-band data transmitting/receiving equipment is interacted with S-band mobile broadcast satellite, by S-band mobile broadcast satellite into line number According to forwarding, the data interaction between bank or marine S-band base station is realized;
The satellite data that locating module is received according to very high frequency(VHF) data transmitting/receiving equipment carries out position calculating, and by result of calculation Match with boat-carrying electronic map, calculates self-position data and navigation data, and be stored in memory module;
Boat-carrying six degree of freedom measuring device is for acquiring six-degree-of-freedomovement movement data during ship's navigation and being stored in storage Module;
Long-focus monopod video camera is used to acquire ship status data and ship under the triggering of information transport management module Periphery sea environmental data, and store in a storage module;
Information transport management module is used to control the gating of S-band channel and very high frequency(VHF) channel, by vessel position data, leads Boat data, six-degree-of-freedomovement movement data pass through very high frequency(VHF) transmission after being packaged according to the message format of very high frequency(VHF) channel defined To the base stations VDES, and broadcasted simultaneously to surrounding sea areas;And the command signal issued according to monitoring center end is from memory module Corresponding data is extracted, and is converted to message format as defined in S-band channel, then monitoring center end is sent to by S-band base station.
Further, the six-degree-of-freedomovement movement data includes:The course angle of ship, forward speed, side velocity and Due to the angular displacement of wave disturbance generation occurred along course, the angular displacement occurred along forward speed direction and along side velocity side To the angular displacement of generation.
Further, the data of the long-focus monopod video camera acquisition are image data or video data.
Further, the ship is when by very high frequency(VHF) channel and S-band channel transmission data, in the message transmitted Head is with unique identity field.
Advantageous effect:Compared with prior art, the present invention has the advantage that:
Very high frequency(VHF) data transmitting/receiving equipment and S-band data transmitting/receiving equipment is arranged simultaneously at ship end in the present invention, and passes through letter The gating that transport management module carries out very high frequency(VHF) channel and S-band channel is ceased, and according to selected channel to number to be transmitted It is encoded according to according to the message format of respective channels defined, the transmission of S channels is increased for the transmission of ship monitor data Channel can shunt the data to be transmitted, improve efficiency of transmission.
Description of the drawings
Fig. 1 is the system architecture diagram of the present invention;
Fig. 2 is the system architecture diagram at ship end.
Specific implementation mode
S-band refers to electromagnetic wave frequency range of the frequency range in 1.55-3.4GHz, be usually applied to relaying, satellite communication and Radar communication field.Supplement network is arranged on ground in S-band satellite needs, using shift frequency forwarding and together between S-band and ground Frequency pass-through mode.Shift frequency pass-through mode is:Ground base station receives S-band satellite downlink Ku band signals, then by Ku wave bands It is forwarded with S-band signal after signal frequency conversion amplification.It is with frequency pass-through mode:Ground base station receives under satellite S-band OFDM Row signal, signal are re-emitted after amplification with S-band frequency, and the S-band ofdm signal intensity in coverage area is made to reach It is required to receiving.
The watercraft remote monitoring system proposed by the present invention communicated based on VDES and S-band, is in ship and monitoring center A S-band sts satellite transmission system, and the setting information transport management module on ship are increased between end, for according to demand Channel type used in free gated transmission data.
The present invention is further described below in conjunction with the accompanying drawings.
Fig. 1 show the overall structure figure of invention, including:Ship end, the base stations VDES, S-band base station and monitoring center end;
VDES systems are constituted between ship end and the base stations VDES, VDES satellites.
S-band sts satellite transmission system is constituted between ship end and S-band base station, S-band satellite.
Monitoring center end is connect by gateway with the base stations VDES and S-band base station, realizes monitoring center end and VDES systems With the access of S-band sts satellite transmission system, the data of base station acquisition can be obtained, and ground control instruction is forwarded by base station.
The system architecture at ship end is as shown in Fig. 2, include:Ship end, the base stations VDES, S-band base station and monitoring center end;
Ship end includes:Very high frequency(VHF) data transmitting/receiving equipment, locating module, S-band data transmitting/receiving equipment, boat-carrying six degree of freedom Measuring device, information transport management module, long-focus monopod video camera, memory module;
Information transport management module respectively with very high frequency(VHF) data transmitting/receiving equipment, locating module, S-band data transmitting/receiving equipment, Boat-carrying six degree of freedom measuring device, long-focus monopod video camera, memory module are connected;
The satellite end interaction data of very high frequency(VHF) data transmitting/receiving equipment and VDES is realized by very high frequency(VHF) channel between ship and ship And the radio communication between ship and bank;
S-band data transmitting/receiving equipment is interacted with S-band mobile broadcast satellite, by S-band mobile broadcast satellite into line number According to forwarding, the data interaction between bank or marine S-band base station is realized;
The satellite data that locating module is received according to very high frequency(VHF) data transmitting/receiving equipment carries out position calculating, and by result of calculation Match with boat-carrying electronic map, calculates self-position data and navigation data, and be stored in memory module;
Boat-carrying six degree of freedom measuring device is for acquiring six-degree-of-freedomovement movement data during ship's navigation and being stored in storage Module;Six-degree-of-freedomovement movement data includes:The course angle of ship, forward speed, side velocity and since wave disturbance generates Along course occur angular displacement, along forward speed direction occur angular displacement and along side velocity direction occur angular displacement;
Long-focus monopod video camera is used to acquire ship status data and ship under the triggering of information transport management module Periphery sea environmental data, and store in a storage module;Ship status data include mainly:In vessel draft situation, hull Each equipment working condition, personnel safety state, sea environmental data include mainly the sea status of ship surrounding sea, wind-force, The position of reef position, island position and other ships.
Information transport management module is used to control the gating of S-band channel and very high frequency(VHF) channel according to transmission demand, by ship Oceangoing ship position data, navigation data, six-degree-of-freedomovement movement data pass through after being packaged according to the message format of very high frequency(VHF) channel defined Very high frequency(VHF) transmission is broadcasted to surrounding sea areas simultaneously to the base stations VDES;And believed according to the instruction that monitoring center end issues Corresponding data is extracted number from memory module and is converted to message format as defined in S-band channel, then is sent by S-band base station To monitoring center end.
Ship realizes positioning, navigation, search and tracking in the process of moving, by the AIS functions of VDES systems, passes through VDE functions are realized and the data exchange between other ships, bank base, sea base, in real time by self-position data, navigation data, six Degree of freedom exercise data is broadcast to the ship closed on and base station, and the ship closed on and base station is enable to obtain the fortune of the ship in real time Dynamic state, avoids the collision between ship, also allows for closing on ship and monitoring personnel carries out soon the ship to break down on the bank Speed positioning and pick-up operation.
All data that ship observation is arrived, i.e., by the collected data of camera, due to being video format or picture Format, it is preferably transmitted by S-band channel, to avoid limited channel resource in excessive occupancy VDE systems.
The above is only a preferred embodiment of the present invention, it should be pointed out that:For the ordinary skill people of the art For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered It is considered as protection scope of the present invention.

Claims (4)

1. the watercraft remote monitoring system communicated based on VDES and S-band, which is characterized in that including:Ship end, the base stations VDES, S Wave band base station and monitoring center end;
Monitoring center end is connect by gateway with the corresponding base stations VDES, S-band base station, and the data that base station obtains, Yi Jitong are obtained Cross base station forwarding command signal;
Ship end includes:Very high frequency(VHF) data transmitting/receiving equipment, locating module, S-band data transmitting/receiving equipment, boat-carrying six degree of freedom measure Device, information transport management module, long-focus monopod video camera, memory module;
Information transport management module respectively with very high frequency(VHF) data transmitting/receiving equipment, locating module, S-band data transmitting/receiving equipment, boat-carrying Six degree of freedom measuring device, long-focus monopod video camera, memory module are connected;
The satellite end interaction data of very high frequency(VHF) data transmitting/receiving equipment and VDES, is realized by very high frequency(VHF) channel between ship and ship and ship Radio communication between bank;
S-band data transmitting/receiving equipment is interacted with S-band mobile broadcast satellite, and carrying out data by S-band mobile broadcast satellite turns Hair realizes the data interaction between bank or marine S-band base station;
The satellite data that locating module is received according to very high frequency(VHF) data transmitting/receiving equipment carries out position calculating, and by result of calculation and ship It carries electronic map to match, calculates self-position data and navigation data, and be stored in memory module;
Boat-carrying six degree of freedom measuring device is for acquiring six-degree-of-freedomovement movement data during ship's navigation and being stored in memory module;
Long-focus monopod video camera is used to acquire ship status data and ship periphery under the triggering of information transport management module Sea environmental data, and store in a storage module;
Information transport management module is used to control the gating of S-band channel and very high frequency(VHF) channel, by vessel position data, navigation number After being packaged according to the message format of very high frequency(VHF) channel defined according to, six-degree-of-freedomovement movement data extremely by very high frequency(VHF) transmission The base stations VDES, and broadcasted simultaneously to surrounding sea areas;And the command signal issued according to monitoring center end is carried from memory module Corresponding data is taken, and is converted to message format as defined in S-band channel, then monitoring center end is sent to by S-band base station.
2. the watercraft remote monitoring system according to claim 1 communicated based on VDES and S-band, which is characterized in that institute Stating six-degree-of-freedomovement movement data includes:Course angle, forward speed, side velocity and the edge due to wave disturbance generation of ship Angular displacement, the angular displacement occurred along forward speed direction and the angular displacement occurred along side velocity direction that course occurs.
3. the watercraft remote monitoring system according to claim 1 communicated based on VDES and S-band, which is characterized in that institute The data for stating the acquisition of long-focus monopod video camera are image data or video data.
4. the watercraft remote monitoring system according to claim 1 communicated based on VDES and S-band, which is characterized in that institute Ship is stated when by very high frequency(VHF) channel and S-band channel transmission data, in the header transmitted with unique identity Field.
CN201810432946.3A 2018-05-08 2018-05-08 Ship remote monitoring system based on VDES and S-band communication Active CN108769139B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810432946.3A CN108769139B (en) 2018-05-08 2018-05-08 Ship remote monitoring system based on VDES and S-band communication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810432946.3A CN108769139B (en) 2018-05-08 2018-05-08 Ship remote monitoring system based on VDES and S-band communication

Publications (2)

Publication Number Publication Date
CN108769139A true CN108769139A (en) 2018-11-06
CN108769139B CN108769139B (en) 2021-06-08

Family

ID=64009834

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810432946.3A Active CN108769139B (en) 2018-05-08 2018-05-08 Ship remote monitoring system based on VDES and S-band communication

Country Status (1)

Country Link
CN (1) CN108769139B (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109362061A (en) * 2018-11-21 2019-02-19 中国运载火箭技术研究院 A kind of bank base of VHF frequency range data exchange system is on duty and management system
CN109714258A (en) * 2019-03-04 2019-05-03 北京大瞭互通科技有限责任公司 A kind of VDES packet data gateway and its implementation
CN109733567A (en) * 2018-12-31 2019-05-10 上海孚实船舶科技有限公司 A method of contactless charging being carried out to underwater operation unit using AUV
CN110289893A (en) * 2019-07-22 2019-09-27 山东星通易航通信科技有限公司 Based on the data transmission method to cooperate between ship in a kind of VDES system
CN111372320A (en) * 2020-04-08 2020-07-03 成都爱科特科技发展有限公司 Ship VDES communication system and method for channel scheduling
CN111628815A (en) * 2020-05-08 2020-09-04 山东星通易航通信科技有限公司 Channel estimation method of satellite VDES system
CN112769911A (en) * 2020-12-30 2021-05-07 广州大湾科技有限公司 Information data interaction method for maritime service set based on VDES
CN115412334A (en) * 2022-08-25 2022-11-29 中交信息技术国家工程实验室有限公司 Method and system for bidirectional authentication of user identity in very high frequency data exchange system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2451063A (en) * 2007-07-13 2009-01-21 Watt Marine Ltd Automatic marine distress transmitter
CN105137452A (en) * 2015-08-26 2015-12-09 上海船舶研究设计院 Deep diving mothership support antenna integrated arrangement structure
CN106209126A (en) * 2016-08-31 2016-12-07 上海鹰觉科技有限公司 Build based on Ship Traffic Service surveillance radar and monitor information network system
CN106788668A (en) * 2016-11-22 2017-05-31 中船航海科技有限责任公司 A kind of boat-carrying Big Dipper AIS combines reception system
CN106875753A (en) * 2017-04-12 2017-06-20 武汉理工大学 Ship berthing accessory system based on technology of Internet of things
CN107329135A (en) * 2017-08-23 2017-11-07 国网福建省电力有限公司 A kind of long range submarine cable marine site safety monitoring system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2451063A (en) * 2007-07-13 2009-01-21 Watt Marine Ltd Automatic marine distress transmitter
CN105137452A (en) * 2015-08-26 2015-12-09 上海船舶研究设计院 Deep diving mothership support antenna integrated arrangement structure
CN106209126A (en) * 2016-08-31 2016-12-07 上海鹰觉科技有限公司 Build based on Ship Traffic Service surveillance radar and monitor information network system
CN106788668A (en) * 2016-11-22 2017-05-31 中船航海科技有限责任公司 A kind of boat-carrying Big Dipper AIS combines reception system
CN106875753A (en) * 2017-04-12 2017-06-20 武汉理工大学 Ship berthing accessory system based on technology of Internet of things
CN107329135A (en) * 2017-08-23 2017-11-07 国网福建省电力有限公司 A kind of long range submarine cable marine site safety monitoring system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
巩海方: "谈甚高频数字交换系统(VDES)", 《中国海事》 *
陈全: "船舶天线布置及检验", 《中国水运》 *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109362061B (en) * 2018-11-21 2021-08-10 中国运载火箭技术研究院 Shore-based watch and management system of VHF frequency band data exchange system
CN109362061A (en) * 2018-11-21 2019-02-19 中国运载火箭技术研究院 A kind of bank base of VHF frequency range data exchange system is on duty and management system
CN109733567A (en) * 2018-12-31 2019-05-10 上海孚实船舶科技有限公司 A method of contactless charging being carried out to underwater operation unit using AUV
CN109733567B (en) * 2018-12-31 2020-01-14 上海孚实船舶科技有限公司 Method for carrying out non-contact charging on underwater operation unit by using AUV (autonomous Underwater vehicle)
CN109714258A (en) * 2019-03-04 2019-05-03 北京大瞭互通科技有限责任公司 A kind of VDES packet data gateway and its implementation
CN110289893A (en) * 2019-07-22 2019-09-27 山东星通易航通信科技有限公司 Based on the data transmission method to cooperate between ship in a kind of VDES system
CN110289893B (en) * 2019-07-22 2022-08-26 山东星通易航通信科技有限公司 Data transmission method based on cooperation among ships in VDES system
CN111372320A (en) * 2020-04-08 2020-07-03 成都爱科特科技发展有限公司 Ship VDES communication system and method for channel scheduling
CN111628815A (en) * 2020-05-08 2020-09-04 山东星通易航通信科技有限公司 Channel estimation method of satellite VDES system
CN111628815B (en) * 2020-05-08 2021-09-10 山东星通易航通信科技有限公司 Channel estimation method of satellite VDES system
CN112769911A (en) * 2020-12-30 2021-05-07 广州大湾科技有限公司 Information data interaction method for maritime service set based on VDES
CN112769911B (en) * 2020-12-30 2023-04-14 广州大湾科技有限公司 Information data interaction method for marine service set based on VDES
CN115412334A (en) * 2022-08-25 2022-11-29 中交信息技术国家工程实验室有限公司 Method and system for bidirectional authentication of user identity in very high frequency data exchange system

Also Published As

Publication number Publication date
CN108769139B (en) 2021-06-08

Similar Documents

Publication Publication Date Title
CN108769139A (en) The watercraft remote monitoring system communicated based on VDES and S-band
CN110351354A (en) The watercraft remote monitoring system communicated based on VDES and S-band
CN104679032B (en) A kind of method for adjusting and communicating using the dynamic antenna of bank base base station and vessel position information
US7809370B2 (en) Space based monitoring of global maritime shipping using automatic identification system
CN108365340B (en) Shipborne antenna control method and device for offshore unmanned aerial vehicle
CN214069930U (en) Unmanned ship mooring unmanned aerial vehicle communication system
US20180231669A1 (en) Systems and Methods for Transmitting Ship Positions and Tracks Over Multiple Communications Channels
CN106899316B (en) Multiple antennas space-based AIS receiver
Lopes et al. Wi-Fi broadband maritime communications using 5.8 GHz band
CN111181657A (en) Ocean distributed self-organizing network system
KR101131944B1 (en) Vessel traffic system
CN111238568A (en) Underwater communication detection integrated system
CN111614368B (en) Maritime multipurpose communication terminal
CN205304979U (en) Emergency satellite communication image transmission system
CN109787677B (en) Handheld terminal based on low-earth-orbit satellite optical communication system
CN114244421A (en) Communication system, method, apparatus, device, and storage medium
CN103236146A (en) Inland river ship energy consumption data transmission system based on AIS network
Yang et al. An integrated vessel tracking system by using AIS, Inmarsat and China Beidou navigation satellite system
CN112822704A (en) Unmanned ship information management method based on multi-channel transmission
CN215121076U (en) Ship remote network communication intercom system
Zordan et al. On the feasibility of an anti-grounding service with autonomous surface vessels
CN114520968A (en) Shipborne intelligent radar monitoring system
US20150089423A1 (en) Geographically Selective Maritime Messaging
Lisaj Integrated communications platform for RIS centres supporting inland navigation
CN216795138U (en) Unmanned aerial vehicle flight confrontation system based on space-based communication

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant